function main() {  
  println(3 + 4);  
  println(3 + "4");  
  println("3" + 4);  
  println("3" + "4");  
  println(3 + 4000000000000);  
  println(3000000000000 + 4);  
  println(3000000000000 + 4000000000000);  
}  
